package com.ruoyi.web.controller.common;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.ruoyi.common.config.MinIoProperties;
import com.ruoyi.common.utils.SecurityUtils;
import com.ruoyi.common.utils.file.FileTypeUtils;
import com.ruoyi.common.utils.file.MinIoUtil;
import com.ruoyi.common.utils.uuid.Seq;
import org.apache.commons.io.FilenameUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    @Autowired
    private MinIoProperties minIoProperties;

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            MinIoUtil.download(minIoProperties.getBucketName(), fileName, response);
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
//    /**
//     * 通用下载请求
//     *
//     * @param fileName 文件名称
//     * @param delete 是否删除
//     */
//    @GetMapping("/download")
//    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
//    {
//        try
//        {
//            if (!FileUtils.checkAllowDownload(fileName))
//            {
//                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
//            }
//            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
//            String filePath = RuoYiConfig.getDownloadPath() + fileName;
//
//            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
//            FileUtils.setAttachmentResponseHeader(response, realFileName);
//            FileUtils.writeBytes(filePath, response.getOutputStream());
//            if (delete)
//            {
//                FileUtils.deleteFile(filePath);
//            }
//        }
//        catch (Exception e)
//        {
//            log.error("下载文件失败", e);
//        }
//    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(@RequestParam("file") MultipartFile file) throws Exception {
        try {
            if (!file.isEmpty()) {
                if (!FileUtils.checkAllowDownload(file.getOriginalFilename())) {
                    throw new Exception(StringUtils.format("文件名称({})非法，不允许上传。 ", file.getOriginalFilename()));
                }
                // 上传并返回新文件名称
                String suffixName = FileTypeUtils.getFileType(file);
                Long userId = SecurityUtils.getLoginUser().getUserId();

                String fileName = StringUtils.format("{}_{}_{}.{}",
                        FilenameUtils.getBaseName(file.getOriginalFilename()),
                        userId,
                        Seq.getId(Seq.uploadSeqType), suffixName);
                String backName = minIoProperties.getBucketName();
                /*动态判断文件上传格式，默认存储于文件桶，如果判断为图片则存储图片筒*/
//                if(checkFileType(file)){
//                    backName = minIoProperties.getBucketOrgImg();
//                }
                String url = MinIoUtil.upload(backName, fileName, file.getInputStream());
                AjaxResult ajax = AjaxResult.success();
                ajax.put("url", url);
                ajax.put("fileName", fileName);
                return ajax;
            } else {
                return AjaxResult.error("上传文件不能为空，请联系管理员");
            }
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    private boolean checkFileType(MultipartFile file) {
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(convertMultipartFileToFile(file));
            byte[] byteArray = new byte[8];
            fis.read(byteArray, 0, 8);

            String magic = bytesToHex(byteArray);
            if (magic.contains("FFD8FFE0") ||
                    magic.contains("89504E47") ||
                    magic.contains("47494638") ||
                    magic.contains("47494639")) {
                return true;
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return false;
    }
    private  String bytesToHex(byte[] bytes) {
        StringBuilder hex = new StringBuilder();
        for (byte b : bytes) {
            hex.append(String.format("%02X", b));
        }
        return hex.toString();
    }
    public File convertMultipartFileToFile(MultipartFile file) throws IOException {
        File convFile = null;
        if (file.equals(null)) {
            return convFile;
        }
        try {
            convFile = new File(file.getOriginalFilename());
            FileOutputStream fos = new FileOutputStream(convFile);
            fos.write(file.getBytes());
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return convFile;
    }
//    /**
//     * 通用上传请求（单个）
//     */
//    @PostMapping("/upload")
//    public AjaxResult uploadFile(MultipartFile file) throws Exception
//    {
//        try
//        {
//            // 上传文件路径
//            String filePath = RuoYiConfig.getUploadPath();
//            // 上传并返回新文件名称
//            String fileName = FileUploadUtils.upload(filePath, file);
//            String url = serverConfig.getUrl() + fileName;
//            AjaxResult ajax = AjaxResult.success();
//            ajax.put("url", url);
//            ajax.put("fileName", fileName);
//            ajax.put("newFileName", FileUtils.getName(fileName));
//            ajax.put("originalFilename", file.getOriginalFilename());
//            return ajax;
//        }
//        catch (Exception e)
//        {
//            return AjaxResult.error(e.getMessage());
//        }
//    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
}
